Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4803255 | Lignin and lignin derivatives as copolymerizable colorants for polyesters | Wayne P. Pruett, Samuel D. Hilbert | 1989-02-07 |
JH
John A. Hyatt
Overall (1989): #94,838 of 140,708Top 70%
1
Patents 1989